Finding the Third Proportional to 64,638 and 140,910

Step by Step Solution

1. Step 1: Write the proportion equation
   64,638 : 140,910 = 140,910 : x
2. Step 2: Convert to fraction form
   64,638/140,910 = 140,910/x
3. Step 3: Cross multiply
   64,638x = 140,910 × 140,910
4. Step 4: Simplify right side
   64,638x = 19,855,628,100
5. Step 5: Solve for x
   x = 19,855,628,100/64,638
6. Step 6: Final answer
   x = 307,181.97